To enable SFTP
In the Administrator, connect to the server, then click the Server tab.
In the left pane, click the Site you want to configure.
In the right pane, click the SFTP Settings tab.
Select the Enable SFTP (SSH2) access check box.
Click Create to create a site key pair. The Create SSH2 Public/Private Keypair dialog box appears.
Type a name for the key pair, the location to store it, then click Finish. The Server generates and stores the key pair.
In the Use encryption algorithms list, select the check boxes for the algorithms you want to allow for encrypting SFTP sessions.
In the Use MAC algorithms list, select the check boxes for the algorithms to use for message authentication.
Click Apply. A message appears telling you the site must be restarted for the changes to take effect. Click Yes.
If you want to change the SFTP port, click the Connection Options tab and specify the port number next to Enable SFTP (SSH2) access on port. (22 is the default port for the SFTP protocol.)